Union Trust Building


Davis Companies

Completion Date


Building Specs

515,000 square feet

Elku/ManFredi Architects

General Contractor

Mascaro Construction Company



LEED Certified

Partnered with National Park Service (NPS) and National Register of Historic Places

project Summary:

Renovation projects in occupied buildings are never easy, but when the opportunity is to work in the iconic Union Trust Building, Clista jumped at the chance.  The historic landmark was built in 1915, and the renovation would take the building into its second century as a modern, LEED Certified property.  Working closely with Mascaro Construction Company, Clista was chosen to supply a design/build electrical package.  The lighting had to be creative and practical to maximize impact while working within budget constraints and satisfying National Park Service historic criteria.

We selected LED fixtures to improve energy efficiency, support LEED certification, and increase the ease of maintenance.  All items selected were to ensure the preservation of the historic integrity and ambiance was achieved.  We replaced the entire electrical distribution system and installed a wide variety of new components.  Although, it was a tall order, the project was completed on time, under budget, and with minimal disruption to the tenants- which is how we build trust with our clients



  • Assuring safety and work performance in an occupied, historic building
  • Installed 609 fixtures with 300 custom made brackets to light the exterior of the building
  • Designed to enhance historic/architectural detail and terracotta finish
  • High output lighting adorned the height of the building to the mansard roof
  • Gracefully illuminated century-old mosaic tiled archways
  • Special attention to site elevations and consistent fixture placement
  • Expertly installed rope lighting for second floor russets
  • Decorative rosette cutouts above windows backlit for dramatic effect
  • Low profile sconces illuminated the building’s majestic finials and columns
  • Fit out of 3 utility vaults with 3 1500 KVA transformers
  • Build out of central chiller plant and collector bus room
  • Installed new surveillance, access control, and fire alarm systems
  • 26 new electric rooms, including risers
  • Attention to relay/based lighting controls to facilitate energy efficiency and management control
  • Illuminated rotunda area and Tiffany glass dome above to accentuate a welcome entry/event space
  • Original torchieres/chandelier globes retrofit with LED lamps to improve energy efficiency and maintain historic integrity
  • Indirect lighting components throughout atrium stack to emphasize architectural details and original finishes
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